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https://www.readbyqxmd.com/read/28225735/evaluating-the-precision-of-auditory-sensory-memory-as-an-index-of-intrusion-in-tinnitus
#1
Doug J K Barrett, Michael Pilling
OBJECTIVES: The purpose of this study was to investigate the potential of measures of auditory short-term memory (ASTM) to provide a clinical measure of intrusion in tinnitus. DESIGN: Response functions for six normal listeners on a delayed pitch discrimination task were contrasted in three conditions designed to manipulate attention in the presence and absence of simulated tinnitus: (1) no-tinnitus, (2) ignore-tinnitus, and (3) attend-tinnitus. RESULTS: Delayed pitch discrimination functions were more variable in the presence of simulated tinnitus when listeners were asked to divide attention between the primary task and the amplitude of the tinnitus tone...
March 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28224625/the-effects-of-venous-ensheathment-on-facial-nerve-repair-in-the-rat
#2
Pei Chen, Christopher J Knox, Linli Yao, Chunli Li, Tessa A Hadlock
OBJECTIVE: To investigate the protective effect of autologous venous ensheathment on sutured rat facial nerve and to test whether the ensheathment could improve the functional recovery of repaired nerve and accuracy of axonal growth. STUDY DESIGN: In vivo study. METHODS: Forty-six rats were examined, with six rats serving as normal controls and 40 receiving facial nerve transection and suture repair (SR) or transection and suture repair with an additional venous ensheathment (VE)...
February 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28218283/place-cells-are-more-strongly-tied-to-landmarks-in-deep-than-in-superficial-ca1
#3
Tristan Geiller, Mohammad Fattahi, June-Seek Choi, Sébastien Royer
Environmental cues affect place cells responses, but whether this information is integrated versus segregated in distinct hippocampal cell populations is unclear. Here, we show that, in mice running on a treadmill enriched with visual-tactile landmarks, place cells are more strongly controlled by landmark-associated sensory inputs in deeper regions of CA1 pyramidal layer (CA1d). Many cells in CA1d display several firing fields correlated with landmarks, mapping positions slightly before or within the landmarks...
February 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28214580/localization-of-oxytocin-receptors-in-the-prairie-vole-microtus-ochrogaster-neocortex
#4
Auriane Duchemin, Adele M H Seelke, Trenton C Simmons, Sara M Freeman, Karen L Bales
Early experience and social context interact to alter the phenotype of complex social behaviors. These early experiences can also result in alterations to cortical organization and connections. Given the ability of the neuropeptide oxytocin (OT) to modulate social and reproductive behavior, OT is likely involved in these cortical processes. However, little is known about the distribution of OT and OT receptors (OTR) within the neocortex. Using autoradiographic and neuroanatomical techniques, we characterized the cortical distribution of oxytocin receptors (OTR) in prairie voles, a socially monogamous rodent species...
February 15, 2017: Neuroscience
https://www.readbyqxmd.com/read/28212413/scarless-deletion-of-up-to-seven-methyl-accepting-chemotaxis-genes-with-an-optimized-method-highlights-key-function-of-chem-in-salmonella-typhimurium
#5
Stefanie Hoffmann, Christiane Schmidt, Steffi Walter, Jennifer K Bender, Roman G Gerlach
Site-directed scarless mutagenesis is an essential tool of modern pathogenesis research. We describe an optimized two-step protocol for genome editing in Salmonella enterica serovar Typhimurium to enable multiple sequential mutagenesis steps in a single strain. The system is based on the λ Red recombinase-catalyzed integration of a selectable antibiotics resistance marker followed by replacement of this cassette. Markerless mutants are selected by expressing the meganuclease I-SceI which induces double-strand breaks in bacteria still harboring the resistance locus...
2017: PloS One
https://www.readbyqxmd.com/read/28202586/waveform-sensitivity-of-electroreceptors-in-the-pulse-weakly-electric-fish-gymnotus-omarorum
#6
Alejo Rodríguez-Cattaneo, Pedro A Aguilera, Angel A Caputi
As in most sensory systems electrosensory images in weakly electric fish are encoded in two parallel pathways, fast and slow. From the work on wave type electric fish these pathways are thought to encode the time and amplitude of electrosensory signals respectively. This article focuses on the primary afferents giving origin to the slow path of the pulse type weakly electric fish Gymnotus omarorum We found that burst duration coders respond with a high-frequency train of spikes to each electric organ discharge...
February 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28197672/functional-near-infrared-spectroscopy-fnirs-brain-imaging-of-multi-sensory-integration-during-computerized-dynamic-posturography-in-middle-aged-and-older-adults
#7
Chia-Cheng Lin, Jeffrey W Barker, Patrick J Sparto, Joseph M Furman, Theodore J Huppert
Studies suggest that aging affects the sensory re-weighting process, but the neuroimaging evidence is minimal. Functional Near-Infrared Spectroscopy (fNIRS) is a novel neuroimaging tool that can detect brain activities during dynamic movement condition. In this study, fNIRS was used to investigate the hemodynamic changes in the frontal-lateral, temporal-parietal, and occipital regions of interest (ROIs) during four sensory integration conditions that manipulated visual and somatosensory feedback in 15 middle-aged and 15 older adults...
February 14, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28195191/polymodal-responses-in-c-elegans-phasmid-neurons-rely-on-multiple-intracellular-and-intercellular-signaling-pathways
#8
Wenjuan Zou, Hankui Cheng, Shitian Li, Xiaomin Yue, Yadan Xue, Sixi Chen, Lijun Kang
Animals utilize specialized sensory neurons enabling the detection of a wide range of environmental stimuli from the presence of toxic chemicals to that of touch. However, how these neurons discriminate between different kinds of stimuli remains poorly understood. By combining in vivo calcium imaging and molecular genetic manipulation, here we investigate the response patterns and the underlying mechanisms of the C. elegans phasmid neurons PHA/PHB to a variety of sensory stimuli. Our observations demonstrate that PHA/PHB neurons are polymodal sensory neurons which sense harmful chemicals, hyperosmotic solutions and mechanical stimulation...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28194135/inaccurate-saccades-and-enhanced-vestibulo-ocular-reflex-suppression-during-combined-eye-head-movements-in-patients-with-chronic-neck-pain-possible-implications-for-cervical-vertigo
#9
Janine L Johnston, Pierre M Daye, Glen T D Thomson
BACKGROUND: The primate ocular motor system is designed to acquire peripheral targets of interest by coordinating visual, vestibular, and neck muscle activation signals. The vestibulo-ocular reflex (VOR) is greatly reduced at the onset of large eye-head (gaze) saccades and resumes before the end of the saccades to stabilize eye-in-orbit and ensure accurate target acquisition. Previous studies have relied on manipulating head movements in normal individuals to study VOR suppression and gaze kinematics...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28191712/ways-of-encoding-somatic-information-and-their-effects-on-retrospective-symptom-reporting
#10
Marta Walentynowicz, Ilse Van Diest, Filip Raes, Omer Van den Bergh
OBJECTIVES: Retrospective symptom reports tend to overestimate actual symptom intensity. This study explored how focusing on sensory-perceptual or on affective-motivational aspects of a somatic experience influenced retrospective symptom reports in high and low habitual symptom reporters (HSR). We hypothesized that a focus on affective-motivational aspects of somatic episodes contributes to retrospective overestimation compared to a focus on sensory-perceptual aspects. DESIGN: Dyspnoea (rebreathing) and pain (cold pain) were induced during two experimental sessions in healthy women: 21 high and 24 low HSR, selected using cut-off scores on a symptom checklist...
February 13, 2017: British Journal of Health Psychology
https://www.readbyqxmd.com/read/28190643/left-habenula-mediates-light-preference-behavior-in-zebrafish-via-an-asymmetrical-visual-pathway
#11
Bai-Bing Zhang, Yuan-Yuan Yao, He-Fei Zhang, Koichi Kawakami, Jiu-Lin Du
Habenula (Hb) plays critical roles in emotion-related behaviors through integrating inputs mainly from the limbic system and basal ganglia. However, Hb also receives inputs from multiple sensory modalities. The function and underlying neural circuit of Hb sensory inputs remain unknown. Using larval zebrafish, we found that left dorsal Hb (dHb, a homolog of mammalian medial Hb) mediates light-preference behavior by receiving visual inputs from a specific subset of retinal ganglion cells (RGCs) through eminentia thalami (EmT)...
February 22, 2017: Neuron
https://www.readbyqxmd.com/read/28188327/tactile-stimuli-affect-long-range-correlations-of-stride-interval-and-stride-length-differently-during-walking
#12
Jung Hung Chien, V N Pradeep Ambati, Chun-Kai Huang, Mukul Mukherjee
Sensory feedback below the sole of the foot using sub-threshold mechanical noise significantly reduced postural sway in patients with diabetes and stroke. However, the effects of tactile parameters on walking are still elusive. Specifically, the effects of such parameters on human gait variability need to be studied because of possible rehabilitation outcomes in terms of bringing improvement in temporal and spatial gait parameters. The purpose of this study was to investigate whether different frequency and amplitude combinations of vibro-tactile stimulation of feet would affect stride-to-stride variability in healthy young adults...
February 10, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28174138/comparison-of-oro-sensory-exposure-duration-and-intensity-manipulations-on-satiation
#13
M P Lasschuijt, M Mars, M Stieger, S Miquel-Kergoat, C de Graaf, Pam Smeets
Oro-sensory exposure (OSE) is an important factor in the regulation of food intake with increasing OSE leading to lower food intake. Oral processing time and taste intensity both play an important role in OSE but their individual contribution to satiation is unknown. We aimed to determine the independent and combined effects of oral processing time and taste intensity on satiation. Fifty eight participants (23±9y, BMI 22±2kg/m(2)) participated in a 2×2 factorial randomized crossover study in which they consumed one of four gel-based model foods until satiation during four sessions...
February 4, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28163139/automaticity-of-phonological-and-semantic-processing-during-visual-word-recognition
#14
Chotiga Pattamadilok, Valérie Chanoine, Christophe Pallier, Jean-Luc Anton, Bruno Nazarian, Pascal Belin, Johannes C Ziegler
Reading involves activation of phonological and semantic knowledge. Yet, the automaticity of the activation of these representations remains subject to debate. The present study addressed this issue by examining how different brain areas involved in language processing responded to a manipulation of bottom-up (level of visibility) and top-down information (task demands) applied to written words. The analyses showed that the same brain areas were activated in response to written words whether the task was symbol detection, rime detection, or semantic judgment...
February 3, 2017: NeuroImage
https://www.readbyqxmd.com/read/28162807/a-brainstem-spinal-cord-inhibitory-circuit-for-mechanical-pain-modulation-by-gaba-and-enkephalins
#15
Amaury François, Sarah A Low, Elizabeth I Sypek, Amelia J Christensen, Chaudy Sotoudeh, Kevin T Beier, Charu Ramakrishnan, Kimberly D Ritola, Reza Sharif-Naeini, Karl Deisseroth, Scott L Delp, Robert C Malenka, Liqun Luo, Adam W Hantman, Grégory Scherrer
Pain thresholds are, in part, set as a function of emotional and internal states by descending modulation of nociceptive transmission in the spinal cord. Neurons of the rostral ventromedial medulla (RVM) are thought to critically contribute to this process; however, the neural circuits and synaptic mechanisms by which distinct populations of RVM neurons facilitate or diminish pain remain elusive. Here we used in vivo opto/chemogenetic manipulations and trans-synaptic tracing of genetically identified dorsal horn and RVM neurons to uncover an RVM-spinal cord-primary afferent circuit controlling pain thresholds...
February 22, 2017: Neuron
https://www.readbyqxmd.com/read/28160509/examination-of-factors-affecting-the-intraoral-perception-of-object-size-a-preliminary-study
#16
Kaori Tomita, Kohji Murakami, Mari Takahashi, Takafumi Ooka, Shouji Hironaka
Oral sensory function is essential for the successful performance of a range of ingestion. Although the perception of object size is important in determining the degree of manipulation, evidence suggests that people does not always perceive the size of the object in oral cavity accurately. The purpose of this study is to investigate the factors affecting the intraoral perception of object size. 23 healthy young volunteers detected the size of cylinders inserted into oral cavity blindly and identified it from the reference set...
February 4, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28153639/parkinson-s-disease-alters-multisensory-perception-insights-from-the-rubber-hand-illusion
#17
Catherine Ding, Colin J Palmer, Jakob Hohwy, George J Youssef, Bryan Paton, Naotsugu Tsuchiya, Julie C Stout, Dominic Thyagarajan
BACKGROUND: Manipulation of multisensory integration induces illusory perceptions of body ownership. Patients with Parkinson's disease (PD), a neurodegenerative disorder characterised by striatal dopamine deficiency, are prone to illusions and hallucinations and have sensory deficits. Dopaminergic treatment also aggravates hallucinations in PD. Whether multisensory integration in body ownership is altered by PD is unexplored. OBJECTIVE: To study the effect of dopamine neurotransmission on illusory perceptions of body ownership...
January 31, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28150124/consolidation-and-restoration-of-memory-traces-in-working-memory
#18
Sébastien De Schrijver, Pierre Barrouillet
Consolidation is the process through which ephemeral sensory traces are transformed into more stable short-term memory traces. It has been shown that consolidation plays a crucial role in working memory (WM) performance, by strengthening memory traces that then better resist interference and decay. In a recent study, Bayliss, Bogdanovs, and Jarrold (Journal of Memory and Language, 81, 34-50, 2015) argued that this process is separate from the processes known to restore WM traces after degradation, such as attentional refreshing and verbal rehearsal...
February 1, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28144622/the-effects-of-pitch-shifts-on-delay-induced-changes-in-vocal-sequencing-in-a-songbird
#19
MacKenzie Wyatt, Emily A Berthiaume, Conor W Kelly, Samuel J Sober
Like human speech, vocal behavior in songbirds depends critically on auditory feedback. In both humans and songbirds, vocal skills are acquired by a process of imitation whereby current vocal production is compared to an acoustic target. Similarly, performance in adulthood relies strongly on auditory feedback, and online manipulations of auditory signals can dramatically alter acoustic production even after vocalizations have been well learned. Artificially delaying auditory feedback can disrupt both speech and birdsong, and internal delays in auditory feedback have been hypothesized as a cause of vocal dysfluency in persons who stutter...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28139712/sounds-can-boost-the-awareness-of-visual-events-through-attention-without-cross-modal-integration
#20
Márta Szabina Pápai, Salvador Soto-Faraco
Cross-modal interactions can lead to enhancement of visual perception, even for visual events below awareness. However, the underlying mechanism is still unclear. Can purely bottom-up cross-modal integration break through the threshold of awareness? We used a binocular rivalry paradigm to measure perceptual switches after brief flashes or sounds which, sometimes, co-occurred. When flashes at the suppressed eye coincided with sounds, perceptual switches occurred the earliest. Yet, contrary to the hypothesis of cross-modal integration, this facilitation never surpassed the assumption of probability summation of independent sensory signals...
January 31, 2017: Scientific Reports
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